Sewing-machine



(No Model.)

E. TQTHOMAS.

` SEWING MACHINE. No. 309,665. Patented Deol 23, 1884.

ilNiTnn STTns EDDY T. THOMAS, OF NEW' YORK, N. Y., ASSIGNOR TO THE NElW HOME SEWING MACHINE COMPANY, OF ORANGE, MASSACHUSETTS.

SEWINGHMACHINE.

SPECIFICATION forming part of Letters Patent No. 309,665, dated December 23, 1884.

Application filed April 17, 1884. (No model.)

37'0 @ZZ whom, may concern:

Be it known that I, EDDY T. THOMAS, of New York city and State, have invented an Im provement in SewingMachines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like'parts.

This invention has for its object certain improvenients in the feeding mechanism.

My present improvements are shown as einbodied in a machine substantially such as described in United States Letters Patent N o. 276,503, granted to me April 24, 1883.

The different features and combinations in which this invention consists will be specifically set forth in the claims at the end of this specification.

Figure l represents an under side view of a sewing-machine containing my imp rovements, Fig. 2, asection of Fig. l on the dotted line .fr x,- Fig. 3, a section on the dotted line a x2; Fig. 4., an inner side view of the feed-dog on a larger scale, and Fig. 5 is a sectional detail of the end of the feed-operating shaft and its adjustable cam on a larger scale.

The feedbaroperating shaft g, arm if, and hook-operating shaft c3 and its slotted arm d, are substantially the same as shown and described in Iatent N o. 27 6,503 referred to, where the same devices are described by like letters, and herein the said shaft will be operated as in the said patent, or they may, if desired, be operated as in United States Letters Patent N o. 277,084, granted to me May S, 1.88.5. The feed-operating shaft is provided with alongitudinal groove, a, which is extend ed backward for about three inches, and receivcs the key a2, having projections 2 8, one at each end. The sleeve a4, having the caniprojection ai to actuate the feed-dog b to move the fabric or material forward over the bedplate A, is made t9 surround the threaded outer end of the shaft g, as best shown in Fig. 5, and also to surround the said key, and bctween the end of the said sleeve and the projection 2 of the key is placed the milled nut a, preferably recessed at its front face to receive the said projection 2, the nut also srrounding the shaft g. Rotation of the nut a3 upon the threaded rotating shaft g independent of the regular rotation of the said shaft moves the cam ci) longitudinally upon the shaft g, and brings a part of it, of greater or less radius, opposite, to strike the feed-dog Z) and move it longitudinally a greater or less distance, according to the position of the said cama5 on the said shaft. The feed-dog b at its rear side is provided with an adjustablelever, b2, (see Fig. 4,) having its fulcrum on a screw or stud, bi. This lever at one end is slotted, as at 4, to receive a screw, b", by which the said lever may be adjusted so as to elevate or depress its outer end, b, with relation to the periphery of cani b5, fast on the shaft g, the said cani, by its action upon the lever b2, serving to raise the fecddog for the proper distance, the extent of the lifting of the feed'dog depending` upon the adjustment ofthe lever 12". The spring b7 effects the backward and the spring bg the downward movement of the feeddog.

I claiml. The feed dog, feed operating shaft, grooved or splined and threaded as described, and the threaded key, combined with the sleeve, its attached feed-inoving cam, andthe nut to adjust the said sleeve and cam on the said shaft, substantially as described.

2. The feed-.bar and the slotted lever b2, the fulcruni-screw b fixed thereon, and the shaft y, and cani b5 thereoincombined with the screw b, to hold the said lever iixedly in adjusted position,the said lever fitting the said fulcrum screw, all substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

` EDDY T. THOMAS. Vitn esses G. XV. GREGORY, B. J. Novas. 

